Repair Instructions

ISC

Flow Solutions Division

ISC2PPDual Pusher Seal

2 © Copyright 2000 Flowserve Corporation

1 Nomenclature

Notes: - Inboard stator (3A) is interchangeable with outboard stator (3).- Inboard mating ring (3C) is interchangeable with outboard mating ring (3B).- Inboard stator carrier (SC1) is interchangeable with outboard stator carrier (SC).- Primary seal O-rings (P, P1, P2, P3, 6, 6A) are all the same size and cross section.

Figure 1

SL 6A P3 SC1 RR M

1CP

3C 3A 3

13 9SCP26141BC1P1

GG1

M1 11A 3B KCT13AB11 10A

3 Outboard Stator

3A Inboard Stator

3B Outboard Mating Ring

3C Inboard Mating Ring

C Outboard Springs

C1 Inboard Springs

SC Outboard Stator Carrier

SC1 Inboard Stator Carrier

P Outboard Dynamic O-ring

P1 Inboard Dynamic O-ring

P2 Outboard Stator O-ring

P3 Inboard Stator O-ring

6 Outboard Mating Ring O-ring

6A Inboard Mating Ring O-ring

G Gasket

G1 Inner Gland O-ring

Table 1

1 Gland Assembly

B Carbon Bushing

1B Inner Gland

14 Rotor Carrier

RR Retaining Ring

CT Centering Tab

K Centering Tab Cap Screw

SL Sleeve Assembly

10A Drive Ring

M Outboard Vibration Dampner

M1 Inboard Vibration Dampner

9 Sleeve Collar

13 Cup Point Set Screw

13A Quarter Dog Set Screw

11 Shaft O-ring

11A Rotor Carrier O-ring

These instructions are written for trained, experienced technicians familiar with the basicprinciples and tools involved in the installation, care and service of mechanical seals and sealsupport systems. A complete reading of these instructions by personnel in contact with theequipment is essential to safety. Incorrect installation, operation or maintenance can result inpersonal injury or death to personnel and damage to the equipment.

3.2 Gland Assembly 1 (Figure 2)

1 Registered Trademark of Loctite Corporation3

3 Inspection and Reconditioning

2 Disassembly

When disassembling seal, inspect for conditions which may have caused theneed for the seal to be removed from service. If seal was removed due topremature failure, determine what conditions caused that failure and correct anyproblems prior to returning the repaired seal to service. For assistance with sealfailure analysis, please contact your Flowserve representative.

Figure 2

Reconditionable Seal Parts

• Gland assembly 1• Sleeve assembly SL• Inner gland 1B• Rotor carrier 14• Sleeve collar 9

Seal Parts that are always replaced

• Inboard and outboard stators 3 and 3A• Inboard and outboard mating rings 3B

and 3C• Springs C and C1• Inboard and outboard stator carriers

SC and SC1• All O-rings P , P1 , P2 , P3 , 6 , 6A ,

G1 , 11 , 11A• Gland gasket G• Vibration dampeners M and M1• Retaining ring RR

• Centering tabs CT and capscrews K

• Cup point and quarter dogset screws 13 and 13A

A

D

E

C

B

3.1 There are certain critical areas of each part where special attention should bepaid to the condition. If any of the areas listed in 3.2, 3.3 or 3.4 show signs ofwear, corrosion, or other defects that cannot be removed without affectingthe dimensional size of the surfaces by more than 0.001 to 0.002", then therespective part should be replaced. If grit blasting is performed, it may benecessary to polish the O-ring surfaces to achieve the required surface finish(see 3.2A and 3.3A for the required surface finish). If any parts requiremachining to correct damage, please contact your Flowserve representativefor dimensional requirements, or for any other questions regarding repair.

A Dynamic O-ring surface - Inspect for wear,fretting, nicks, scratches, or corrosion.Required surface finish: 32 RMS

B Gasket surface - Remove the old gasketand clean the gasket surface. Inspect fornicks, scratches, or corrosion.

C Pipe taps and other threaded holes -Inspect for damaged threads or corrosion.Taps must be clean and free of debris andcorrosion. Re-tap as necessary.

D Bushing - Inspect for wear, breakage, orloosened bond with gland. Replace usingLoctite®1 7471 Primer T and Loctite RCTM/640or equivalent to adhere the bushing if any ofthese conditions exist. A ten minute cure at 400°F(204°C) is required to achieve full bond strength.If worn or corroded, contact your Flowserve representative.

4

3.4 Inner Gland 1B (Figure 4)

A Dynamic O-ring surface - Inspectfor wear, fretting, nicks, scratches,or corrosion. Required surfacefinish: 32 RMS

B Gland O-ring surface - Inspectfor wear, nicks, scratches,or corrosion. Required surfacefinish: 63 RMS.

C Gasket surface - Removeold gasket and clean surface.Inspect for nicks, scratches,or corrosion.

D Anti-rotation pins - Inspect forwear or corrosion. If worn orcorroded, contact your Flowserverepresentative.

Figure 4

B

A

C

D

3.3 Sleeve Assembly SL (Figure 3)

A O-ring surfaces - Inspect for wear,nicks, scratches, or corrosion.Required surface finish: 63 RMS.

B Drive Ring 10A - Inspect forwear or corrosion, especiallyat drive flat surfaces onID of drive ring.

C Drive flats for rotorcarrier - Inspect forwear, rounding ofedges of flats, orcorrosion.

D Drive end roundnessNo greater than0.001" TIR

Figure 3

A

B

C

D

3.5 Rotor Carrier 14 (Figure 5)

A O-ring surfaces - Inspect forwear, nicks, scratches,or corrosion. Requiredsurface finish: 63 RMS.

B Pumping vanes - Inspect forwear, damage, or corrosion.

C Drive flats - Inspect for wearor corrosion.

Figure 5

BA

C

4.4 Place the sleeve assembly SL on a flat surface with thecollar end facing up. Installthe inboard vibration dampener M1 into the sleeve end housing.Place the inboard mating ringO-ring 6A in the sleeve O-ringgroove behind the surface withdrive flats in the sleeve. (Figure 7)

5

4 Seal Assembly Instructions

4.1 Tools Required• 3/32", 1/8" hex key wrenches (Sizes < 2.625"); 1/8", 3/16" hex key

wrenches (Sizes 2.625" and larger)• Silicone grease (included in repair kit)• Ethyl alcohol or acetone and clean, lint free towel for cleaning seal faces

4.2 As part of the assembly of the seal, there are several blind fits of pins anddrive flats. It may be helpful to mark the locations of the pins or drive flatswith a felt tip marker, or to align the feature with another visible feature onthe seal to assist with assembly. All seal faces should be cleaned withalcohol or acetone prior to placing the faces together at each respective stepin the assembly process.

4.3 Arrange O-rings by diametri-cal size. There are four sizestotal: quantity 1 of the largestsize O-ring G1 , quantity sixof the 2nd largest size O-rings P P1 P2 P3 6 and 6A ,quantity one of the 2nd small-est size O-ring 11A andquantity 1 of the smallestsize O-ring 11 . Prior toinstalling each O-ring at itsrespective step, lightlylubricate with silicone greaseand stretch slightly.

3.6 Sleeve Collar 9 (Figure 6)

A Threaded holes - Inspect for threaddamage and re-tap as necessary.

B ID bore roundness - no greater than 0.002" TIRC Set screws - Replace cup point and dog point set

screws with those included with the repair kit.Make sure the same threaded holes are used withthe same type set screws.

Figure 6

B

A

M

VibrationDampener

O-ring6

Figure 7

4.5 Align the two flats on theinboard mating ring 3C withthe two flats on the inside ofthe drive ring 10A in thesleeve end housing, andpress the mating ring intoplace using finger pressureonly. (Figure 8)

4.6 Place the inboard statorO-ring P3 on the O-ringsurface of the inboard stator 3A , which is the smallestoutside diameter. Placestator face down on a clean,flat surface. (Figure 9)

4.7 Align the stator drive pins instator carrier SC with thedrive slots in the stator andpress the stator carrier inplace using finger pressureonly. (Figure 10)

4.8 Install the springs C inholes of stator carrier.

3A

MatingRing

Drive Flats 10A

DriveRing

Figure 8

6

Figure 10StatorCarrier

SpringLocations

Stator

3

SCAlign Pinwith Slot

Figure 9

O-ringP3

Stator3A

7

4.9 Place the stator and statorcarrier assembly face downonto the sleeve/mating ringassembly. (Figure 11)

4.10 Place the inboard dynamicO-ring P1 in the dynamicO-ring surface of the innergland. (Figure 12) Align theinner gland drive pins withthe slots in the outside diam-eter of the stator carrier andpress the inner gland ontothe stator carrier, using evenhand pressure. (Figure 13)Caution: do not rotate theinner gland to align the pinswhile pressing down. Thiscould damage the springs.Once the inner gland is in theproper position, do not rotateit until the seal is fully assem-bled to ensure that the pinsremain aligned.

Figure 11

Figure 12 Figure 13

Slots

DrivePins

P1O-Ring

StatorCarrier

Assembly

Sleeve/MatingRing Assembly

4.11 Place the inner gland O-ring G1 into the face groove inthe inner gland. (Figure 14)

4.12 Place the rotor carrier O-ring 11A in the smallest diametergroove of the rotor carrier 14(Figure 15)

Figure 14

4.14 Insert the retaining ring RR into thegroove in the sleeve assembly whilepressing down on the rotor carrier.Make sure that the retaining ringsnaps completely into the groove inthe sleeve assembly. (Figure 17)

4.13 Align the three drive flats on the rotorcarrier with the drive flats on thesleeve and press the rotor carrier onthe sleeve with the pumping vanesface up. (Figure 16)

Figure 15

Figure 16

Drive Flats

Drive Flats

Rotor Carrier

Sleeve

RetainingRing

Groove

8

Figure 17

Retaining Ring RR

4.15 Insert the outboard vibrationdampener M into the rotorcarrier. Make sure that thevibration dampener is fullyseated at the bottom of therotor carrier. Place the out-board mating ring O-ring 6in the O-ring groove of therotor carrier, which is behindthe surface with two driveflats. (Figure 18)

4.16 Repeat steps 4.5 through 4.9to assemble the outboardmating ring 3B , outboardstator 3 , outboard statorO-ring P2 , outboard statorcarrier SC , and springs Conto the rotor carrier/sleeveassembly.

4.17 Place the outboard dynamicO-ring P in the dynamicO-ring surface of the glandassembly. (Figure 19)

4.18 Align the gland assembly drivepins with the slots in the out-side diameter of the statorcarrier and press the glandonto the stator carrier, usingeven hand pressure.(Figure 20)Caution: do not rotate thegland to align pins whilepressing down. This coulddamage the springs. Oncethe gland is in the properposition do not rotate it untilthe seal is fully assembled toensure that the pins remainengaged.

Figure 20

Figure 19O-ringP

GlandAssemblyDrive Pins

Figure 18

9

O-ring6

VibrationDampner

M

4.19 Place the sleeve collar 9onto the end of the sleevewith the “Flowserve” logofacing up. Align the quarterdog set screws with thesmaller holes in the end ofthe sleeve. (Figure 21) Onsmaller seal sizes, one ofthe quarter dog set screwswill be offset by 15 degrees.Align this quarter dog setscrew with the correspond-ing offset hole in the end ofthe sleeve. Do not tightenany set screws at this time.Install the centering tabs CTand flat head cap screwsinto the collar while engagedwith the gland. Be sure tokeep the collar aligned andbe careful not to rotate thegland.

4.20 Using firm hand pressure,press down on the collar tobe even with the end of thesleeve assembly. This will inturn press down the glandand inner gland, compressingthe springs. While holding thecollar even with the end ofthe sleeve assembly, tightenthe quarter dog set screwsinto the holes in the sleeveuntil snug.Be careful not to distort thesleeve by over tighteningthe quarter dog set screws.

Note: if the collar cannot bepressed down to be even withthe end of the sleeve, thegland or inner gland drive pinsmay not be aligned. If this isthe case, do not attempt torotate the gland or inner glandto align the pins. The glandand/or inner gland should bedisassembled and re-alignedprior to proceeding further.

Figure 21

Figure 22

10

CenteringTabs

CT

5 Static Testing

5.1 Flowserve manufacturing typically tests the ISC at 25 psig. A pressure dropof less than one pound at 25 psig is acceptable. To static test the seal, boltor clamp the seal to a pump seal chamber or other device which will hold theinner gland up against the gland. WARNING: Failure to do this will result inthe inner gland unseating from the gland under pressure, possibly resultingin damage to the inner gland O-ring and also causing a personal safety risk.Secure the cup point set screws to the stub shaft or equipment shaft to preventdeformation of the centering tabs due to axial loads. Apply pressure at eitherof the tangential barrier fluid ports, while plugging the opposite port. If theseal does not pass the static pressure test, disassemble the seal and inspectfor O-ring damage, as this is the most common cause of static test failure.

6 Installation

6.1 Refer to the ISC Installation Instructions, FIS120, for proper seal installation.

4.21 Install the shaft O-ring 11into the inside diametergroove of the sleeveassembly. (Figure 23)

4.22 Adhere the gland gasket Gto the inner gland gasketsurface with a spray adhe-sive such as 3M Super 77®2.(Figure 23)

Figure 23

O-ring11

Gland GasketG

11 2 Trademark of Minnesota Mining and Manufacturing Company.

TO REORDER REFER TOB/M #F.O.

FIS137ORG 06/00 USA

Flowserve Corporation Flow Solutions Division

Printed in U.S.A.ISO 9000Certified

GermanyBrazilMexico

Kalamazoo, MIPhone 616-381-2650Fax 616-381-8368

United States

RoosendaalPhone 31-165-581400Fax 31-165-552622

Netherlands

DortmundPhone 49-231-6964-0Fax 49-231-6964-248

Edmonton, AlbertaPhone 780-463-7958Fax 780-450-1241

Canada

Sao PauloPhone 55-11-4066-8600Fax 55-11-4066-70144

TlaxcalaPhone 52-2-461-6791Fax 52-2-461-6847

Phone 65-746-4318Fax 65-747-1963

OsakaPhone 81-720-85-5571Fax 81-720-85-5575

Singapore Japan

Villa MartelliPhone 54-11-4709-6800Fax 54-11-4709-7072

Argentina AustraliaMarayong NSWPhone 61-2-8822-7100Fax 61-2-9679-7511

Primary Worldwide Flow Solutions Division Locations Licensees, authorized agents, and affiliated companies located worldwide

www.flowserve.com

Scarborough, OntarioPhone 416-292-2877Fax 416-292-5190

The information and specifications presented in these repair instructions are believed to be accurate, but are not guaranteed by Flowserve as tocompleteness or accuracy. Although Flowserve Corporation can provide general application guidelines, it cannot provide specific informationfor all possible applications. The purchaser/user must therefore assume the ultimate responsibility for the proper selection, installation, operationand maintenance of Flowserve products. Because Flowserve Corporation is continually improving and upgrading its product design, thespecifications, dimensions and information contained herein are subject to change without notice.